Efficient and Direct Nucleophilic Difluoromethylation of Carbonyl Compounds and Imines with Me<sub>3</sub>SiCF<sub>2</sub>H at Ambient or Low Temperature
作者:Yanchuan Zhao、Weizhou Huang、Ji Zheng、Jinbo Hu
DOI:10.1021/ol202208b
日期:2011.10.7
by using a proper Lewis base activator, Me3SiCF2H can efficiently difluoromethylate various aldehydes, ketones, and imines to give the corresponding products in good to excellent yields at room temperature or even at −78 °C.
自1995年以来,Me 3 SiCF 2 H被广泛认为是一种无效的二氟甲基化剂,它需要苛刻的反应条件才能裂解其相当惰性的Si–CF 2 H键。然而,现在发现,通过使用合适的路易斯碱活化剂,Me 3 SiCF 2 H可以有效地二氟甲基化各种醛,酮和亚胺,从而在室温或什至于-78的条件下以良好或优异的收率获得相应的产物。 ℃。